Introduction
If the bottom case of your device become cracked or damaged, this guide will show you how to replace it.
Tools
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            Use the nylon spudger to remove the rubber pads near the hinge for the screen. Then remove the screws under the pads. 
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            Use Phillips #0 to remove four 9mm screws. 
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            Use Phillips #0 to remove seven 6mm screws. 
 
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            Use the nylon spudger to pry the back casing near the hinges for the screen. 
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            Continue to pry along the edge of the back case until the back is ready to be removed. 
 
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            Use the plastic opening tool to lift up on the white tab that is holding the cable in place on the motherboard. 
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            Now carefully pull the cable out of place and remove the entire back casing. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.